Q: What are the prime factors of the number 233,520?

 A: 2, 3, 5, 7, 139

Why are those the prime factors of the number 233,520?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 233,520

233,520
Factor Arrows
2116,760
Factor Arrows
258,380
Factor Arrows
229,190
Factor Arrows
214,595
Factor Arrows
34,865
Factor Arrows
5973
Factor Arrows
7139

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 5, 7, 139

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 7 x 139 = 233,520

This can also be written as 24 x 31 x 51 x 71 x 1391 = 233,520

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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